I have the same problem, with a 2011 Fusion 2.5L and have taken it to my Ford dealer twice, each time they say its normal engine noise(which I don't believe)....other than the engine noise I am very happy with the car...but when it comes time to trade it in with a noise like that who will take it??....I am now going to take it for the 3rd time and was suggested have the engine scoped......Thank you for the advice